Outlook 2002 – The messaging interface has returned an unknown error


Basically this message comes when the outlook storage capacity is full

Outlook, It can’t hold one more message.

You can’t delete because the message is only going to another folder inside the file cabinet.
Can’t send – no space to hold the message.

Super easy fix is –

In any folder, deleted, sent, inbox click on a message you want to delete. Start from the deleted folder. You have already deleted it once

Using…. shift+delete… get rid of the messages. This method blows it out of Outlook completely. If you click on a message and holding the shift key down you can highlight many messages and get rid of them.

After you get rid of about 30 messages you have enough room for the delete key to work.

Keep dumping the deleted items folder as you are working in sent or the inbox.

You’ll get your Outlook Program working back to normal. 1.8 GB is the capacity of default outlook storage

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2 Responses


JoAnne May 28, 2009 at 12:46 pm

I have been online searching for a fix for this for 2 hours. Your tip is the ONLY thing that worked. THANK YOU!!!


JavaTechie May 28, 2009 at 12:46 pm

You are most welcome JoAnne..!!


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